Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b551c1fdd1f59b2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 22:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bb4344134d269013b92f5b926a40b2b SHA-1: 6092bb9fe3cc87b1e5598bb5e9ef70e759a78299 SHA-256: 2b551c1fdd1f59b2a7e5ad9953fad335fb9d91fb8cebf6889d0bd2e7fda6b47c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=aggie+war+hymn+sheet+music+pdf'. Another critical heuristic identified a PDF link farm, with many links pointing to external PDFs hosted on domains like cdn.shopify.com and various other subdomains. The document body contains garbled text but includes the same malicious redirector URL and several benign-looking Shopify URLs, suggesting a lure or SEO manipulation tactic.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=aggie+war+hymn+sheet+music+pdf
    • http://nupiwada.nashvilleburnbootcampclub.com/uploads/1/3/1/1/131164159/xijipuramiru.pdf
    • http://files.bearberryessentials.com/uploads/1/3/0/7/130775786/wirufixura-sudaganatix-gatop-zotepelazuruved.pdf
    • http://files.hogsandairdogs.com/uploads/1/3/2/7/132740467/a17557e.pdf
    • http://fepevud.sjjmc.org/uploads/1/3/1/4/131453133/9214564f2.pdf
    • http://files.mountainridgefootball.com/uploads/1/3/2/8/132814906/nuzoxugik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/4370184031.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/xawuxelolinal.pdf
    • https://cdn.shopify.com/s/files/1/0436/2731/5353/files/rotate_web_page_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/0830/3002/files/ptexam_the_complete_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8864/9123/files/85171470428.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/read_the_four_agreements_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/mumodakuxuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1294/files/87819733347.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/ketogenic_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/18271858136.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8320/files/16188970993.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c63.bin
86fc348f1f44ac15d6b008458458ed5e72ee736507a7952a4200730911c9a532
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C63 5720 bytes
font_01_sfnt_off00008fd0.bin
a72ec6fa3f55f5c9ca40ad45441c945be183febd56b00094e86e4092dd139f82
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD0 10240 bytes